package com.hua.syn;

import java.util.concurrent.locks.ReentrantLock;

public class TestLock {

    public static void main(String[] args) {
        TestLock2 testLock2 = new TestLock2();

        new Thread(testLock2).start();
        new Thread(testLock2).start();
        new Thread(testLock2).start();


    }



}
class TestLock2 implements Runnable{
    int num = 10;
    //定义lock锁
    private final ReentrantLock lock=new ReentrantLock();

    @Override
    public void run() {
        while (true){
            try {
                lock.lock();//加锁
                if (num>0){
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    System.out.println(num--);
                }else {
                    break;
                }
            }finally {
                lock.unlock();
            }

        }
    }
}